md: add support for raising dm events.
dm uses scheduled work to raise events to user-space.
So allow md device to have work_structs and schedule them on an error.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 012482a..f877569 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6068,6 +6068,8 @@
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
+ if (mddev->event_work.func)
+ schedule_work(&mddev->event_work);
md_new_event_inintr(mddev);
}
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 6e7e349..c88b047 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -318,6 +318,7 @@
struct bio *barrier;
atomic_t flush_pending;
struct work_struct barrier_work;
+ struct work_struct event_work; /* used by dm to report failure event */
};